Przypomnijmy: 

M = 1000

C = 100

X = 10

L = 50

I = 1

V = 5

 

$\underset{1000}{\underbrace{M}}\underset{900}{\underbrace{CM}}\underset{40}{\underbrace{XL}}\underset{4}{\underbrace{IV}}=1944$